Drop-wire bar for looms



H.'F. LIVERIWORE.A

" uno? wma BAR Foa Looms.

ARPLlcA'rjon msn MN. 24. 1922.

@433,558@ mma 00t.31,1922.

fmfenw, Hamm FL veaqmaej cause the machine to stop at once.

Patented- Oct.. 31 1922.

ITED STATES HOMER F. LIVERMORE, OF BOSTON, MASSACHUSETTS.

DROP-TIRE BAR FOR LOOMS.

Application filed l'anuary 24, 1922.

To LZ1 i/flwm if may conce/ra:

Be it known that I, HoMER F. LIvERMonE, a citizen of the United States, residing at Boston. in the county of Suffolk and State of l\lassachusetts, have invented certain new and useful Improvements in Drop-VVire Bars for Iiooms. of which the following is a specification.

In certain well known kinds of looms, it is customary to provide a warp-stop whereby the breaking of any of the warp threads will In accomplishing this, a thin steel bar slidably carries a series of slotted members. or wires each supported by a warp thread and so disposed that when a thread breaks, the associated wire drops a short distance and by its entrance between certain approaching jaws holds the latter from closing and thereby stopsfthe loom.

The difficulty with this arrangement is that the slotted ends of such thin steel bar frequently break away and thereby render the entire bar useless, and a new one must be provided, entailing not only the loss of the old bar, but necessitating considerable loss of time in threading all the drop wires upon the new bar.

The object of this invention is the construction of means whereby all such broken bars can be used again, as well as rendering it easier and more economical in fitting new bars to their task.

In the drawings forming lpart of this specification, Fig. 1 is a perspective view of a part of such a drop-wire bar and associated members showing my means for attaching its end to the well-known supporting casting. Fig. Q is a side view of the terminal portions of the bar showing my attaching devices connected therewith, one of the devices being in section. Fig. 3 is a top view of the same, with one of the attaching devices in section.

Referring to Fig. 1, the reference numeral 1 designates a drop-wire bar, 2 are two of the drop-wires, 3 is one of the Airocking jaws between which a dropped wire "descends and stops the loom7 and 4t is one of the supporting castings having a lug 5 to which an end of the bar 1 is customarily fastened.

Each of the large number of drop-wires 2 has an elongated slot 6 loosely penetrated by Serial No. 531,495.

the bar 1 and supported as by a thread or wire 7 from a warp thread passing freely through it, in a well known manner.

The attaching device for each end of the bar 1 consists of a casting or forging 10 having a socket 11 disposed to receive an end of the bar 1, the latter being fastened therein by set screws 12, as shown in Figs. 2 and and slotted ear 13, the slot 14 therein bein;` made suiiciently long to fit the distance fetween the lugs 5 should the bars 1 not be cut to exact length. Through this slot 11i is inserted a bolt 15 through the lug 5 in the usual manner.

In order to accommodate the new atta-ching device to looms now on the market, the under wall 16 of the socket 11 is made very thin, and its top wall 17 made extra thick to provide the necessary strength, and in addition to such thickness of wall, the sides and top are provided with a rib 19, each side :2O having a boss 21. for the passage of the set screws 12. As illustrated in Fig. 3, each ear 13 is made of substantially the same thickness as the bar 1 in order that the same bolts 15 may be used as those formerly employed.

In order to utilize an old bar 1, whether terminally broken or otherwise. its ends are cut square off to the proper length and inserted in the socket 11. Then.y the screws 12 being set tightly up, and the bolts 15 introduced through the slots 14 and lugs 5 and suitably turned up, the bar is ready for use.

The drop-wires 2 are, of course, strung upon the bar before one or both the attach- 'ing devices have been thus applied to the What I claim is: 1. A drop-wire bar for looms, comprising a length of thin bar, and an attaching member for the end thereof, said member consistingof a socket for receiving the bar-end, fastening means for retaining it therein, and a slotted ear.

2. A drop-wire bar for looms, comprising a length of thin bar, and an attaching member for each end thereof, the said member consisting of a socket and a thin slotted ear, the socket walls being strengthened above the bar, and the ear being substantially equal in. thickness to said bar,

3. A drop-Wire bar `for looms, comprising a length of thin bar, and an attaching device for each end thereof, Said device consisting of a socket for receiving an end of the bar, the socket having its top Wall considerably thicker than its bottom Wall, aboss on each side, a, rib on the sides and top, and

a thin slotted ear at its end, and set screws in said bosses for looking the bar-end in place.

l In testimony that I claim the foregoing invention, I have hereunto set 'my hand this 16th day of January, 1922. f y

HOMER F. LIVERMORE. 

